Not a teacher.
I understood what my friends begged or encouraged me. So, thanks to them.
---Present Perfect Tense---
Active Voice: Holland have won over Cameroon today. >> Sorry, it became an object of preposition.
Passive Voice: Cameroon have been won by Holland yesterday.
Though Holland and Cameroon are common nouns which contain a group of players, should I use a plural verb just like “have”?
This is a difference between British and American English. Americans tend to think collective nouns take a singular verb. The Brits think otherwise. Congress is, but Parliament are.
In America, we would simply say "Holland won over Cameroon today." Or "Holland has won."
---Present continuous Perfect Tense---
Active Voice: Tom has been killing venomous snakes since last year.
Passive Voice: Venomous snakes have been being killed by Tom since last year.
---Past Perfect Tense---
Active Voice: When they had gone to Argentina they saw an acrobat.
Passive Voice: Argentina had been gone by them and saw an acrobat.
No, Argentina is not "been gone by them." If you really need to make this passive, I would say "An acrobat was seen by them when they had gone to Argentina."
---Past Continuous Perfect Tense---
Active Voice: My father had been teaching me an Arabic language since I was a child.
Passive Voice: An Arabic language had been being taught by my father since I was a child.
Should I write “being” during the passive voice for past/present continuous perfect tense?
I think the first should be "has been teaching," unless he stopped teaching you. It's still an unnatural wording. If the action stopped, I would say "My father taught me Arabic when I was a child."
[Not sure about "an" Arabic language. Is there more than one? I thought Arabic was Arabic.]
The second needs to include you. "Arabic has been taught to me by my father since I was a child."
---Future Continuous Tense---
Active Voice: by the time my friend gets money he will be going to his country.
Passive Voice: by the time some money is gotten by my brother he will be going to his country.
"When" is simpler. When my friend gets some money, he will be going back to his country.
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